\begin{table}[!htbp] \centering
\caption{Mean comparison municipalities with/without Francoist street names in June 2001}
\label{tab:ttest_sample2001}
\small
\begin{tabular}{lcccc}
\\[-1.8ex]\hline
\hline \\[-1.8ex]
\\[-1.8ex]
Party & In sample & Out of sample & Diff & P-value \\
\hline \\[-1.8ex]
& \multicolumn{4}{c}{April 2019}\\
PP & 27.23\% & 23.47\% & 3.75 & 0.000*** \\
PSOE & 31.53\% & 27.75\% & 3.77 & 0.000*** \\
VOX & 12.22\% & 9.08\% & 3.15 & 0.000*** \\
\hline \\[-1.8ex]
& \multicolumn{4}{c}{June 2016}\\
PP & 44.85\% & 37.74\% & 7.11 & 0.000*** \\
PSOE & 26.9\% & 22.86\% & 4.04 & 0.000*** \\
VOX & 0.21\% & 0.2\% & 0.02 & 0.278 \\
\hline \\[-1.8ex]
& \multicolumn{4}{c}{December 2015}\\
PP & 40.85\% & 34.57\% & 6.28 & 0.000*** \\
PSOE & 27.5\% & 22.95\% & 4.55 & 0.000*** \\
VOX & 0.24\% & 0.22\% & 0.02 & 0.260 \\
\hline \\[-1.8ex]
& \multicolumn{4}{c}{November 2011}\\
PP & 55.17\% & 46.2\% & 8.96 & 0.000*** \\
PSOE & 31\% & 27.78\% & 3.21 & 0.000*** \\
\hline \\[-1.8ex]
& \multicolumn{4}{c}{March 2008}\\
PP & 48.65\% & 41.07\% & 7.58 & 0.000*** \\
PSOE & 42.99\% & 39.63\% & 3.37 & 0.000*** \\
\hline \\[-1.8ex]
& \multicolumn{4}{c}{March 2004}\\
PP & 48.49\% & 41.57\% & 6.92 & 0.000*** \\
PSOE & 42.09\% & 36.68\% & 5.41 & 0.000*** \\
\hline \\[-1.8ex]
& \multicolumn{4}{c}{March 2000}\\
PP & 53.18\% & 46.81\% & 6.37 & 0.000*** \\
PSOE & 36.21\% & 31.46\% & 4.74 & 0.000*** \\
\hline
\hline \\[-1.8ex]
\multicolumn{5}{c}{\parbox[t]{0.65\textwidth}{\textit{Note:} * $p<0.05$; ** $p<0.01$; *** $p<0.001$.}}\\
\end{tabular}
\end{table}
